A Search for Variable Stars in Two Northern Open Clusters: NGC 381 and NGC 637 Article for grades 6 through 12 Because professional observatories can rarely offer the large blocks of time needed to search for variable stars, this 12th-grader from Maine outlines a system for using amateur equipment.
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		Astro Snapshot Evidence and Analysis for grades 6 through 12 Don't miss the latest spectacular images from observatories around the world and in space. Visit our weekly Astro Snapshot for new sightings in our observable universe.
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		Astro Viz: Colliding Galaxies Article for grades 6 through 12 In three billion years, our Milky Way Galaxy will collide with its nearest neighbor, the Andromeda Galaxy. See how these two spiral galaxies are expected to merge, forming an elliptical galaxy.
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		Astro Viz: Extrasolar Planets Article for grades 6 through 12 Since 1995, astronomers have discovered more than 100 planets orbiting stars beyond our Sun—only a fraction of those thought to exist. Take an interactive tour of the Milky Way Galaxy to visit these "exoplanets."
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		Astro Viz: Nearby Stars Article for grades 6 through 12 We see only a fraction of the stars in our Milky Way Galaxy when we gaze at the night sky. Find out why the stars that appear brightest to us are not necessarily the closest to Earth.
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		Building a Spectroscope Curriculum Materials for grades 6 through 12 White light is a mixture of all colors of visible light, but it doesn't always include every color of the rainbow. Build a spectroscope, and view the spectral fingerprints of different light sources.
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		Impact! Tracking Near-Earth Asteroids Article for grades 6 through 12 Most space rocks don’t pass anywhere near Earth. Meet the astronomers on wary watch for the ones that do. You’ll see firsthand how they are able to find asteroids in a celestial crowd.
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		Journey to a Black Hole Article for grades 6 through 12 If you could take a trip to a black hole, would you? Before you answer, take a peek at what you'd encounter. The trip certainly would qualify as adventure travel!
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		Light: Its Secrets Revealed Article for grades 6 through 12 Did you know that when you look at a star, your eyes are capturing light that traveled all the way from the star to your eye? Learn more about how light carries information from distant objects.
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		Newton's Laws of Motion and Gravity Applied to Meteorites Activity for grades 6 through 12 Did it all start when an apple bopped Isaac Newton on the head? This activity explores some of the ways his fundamental laws are expressed in our dynamic solar system.
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		Research on the Web: Earth Viewer Activity for grades 6 through 12 When the sun is setting where you live, where is it rising? And where on Earth can an entire season go by without a minute of darkness? Find out with this interactive Web investigation.
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